Propeller-shaft bearing



(No Model.)

W. M. CAMPBELL. PROPELLER SHAFT BEARING. No. 563,134 Patented June 30,1896.

MJHOTU-UTKQWASHINEWNJC UNITED STATES PATENT OFFICE.

WILLIAM M. CAMPBELL, OF- CHELSEA, MASSACHUSETTS.

PROPELLER-SHAFT BEARING.

SPECIFICATION forming part of Letters Patent No. 563,134, dated June 30,1896.

Application filed August 30,1895- Serial No. 561,058. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM M. CAMPBELL, a citizen of the United States,and a resident of Chelsea, in the county of Sufiolk and State ofMassachusetts, have invented. newand useful Improvements in Propeller-Shaft Bearings, of which the following, taken in connection with theaccompanying drawings, is a specification.

This invention relates to improvements in propeller-shaft bearings forsteam ships or vessels; and it has for its object to prevent thepropeller-shaft from longitudinal movement in its bearing caused by theaction of the propeller; also, to prevent the water from entering thevessel at the place where the propeller-shaft goes through thestern-post, and holds the lubricant from escaping from the bearing, thuspreventing the wearing of the propeller-shaft where it is journaled inthe bearing.

The invention is carried out as follows, reference being had to theaccompanying drawings, wherein I Figure 1 represents a side elevation ofthe stern portion of a steam vessel, showing the improved bearing andits connection to the stern-post in section. Fig. 2 represents an endview seen from X in Fig. 1. Fig. 3 represents a vertical section on theline 3 3 shown in Fig. 1. Fig. 4: represents a detail sectional view ofone of the improved bearing parts, and Fig. 5 represents an endelevation of a modification of the invention.

Similar letters refer to similar parts whereever they occur on thedifferent parts of the drawings.

A represents the stern-post of a steam vessel, B the keel, and O therudder-post, to which is hung the rudder D, .as usual.

E is the propeller-shaft, to the outer rear end of which is secured thepropeller F, as shown in Fig. 1.

The improved bearing is made in two semicircular parts G G, havingpolygonal flanges G G for turning it by means of a wrench or similartool when securing it to or removing it from the stern-post A. Eachsemicircular part G is provided with an external screwthread g, which isscrewed into an internallyscrew-threaded socket A in the hub A of thestern-post A, as shown in Fig. 1.

The bearings G G are provided with grooves g g, adapted to receive theannular rings or projections e e on the propeller-shaft E, and withintermediate annular projections 9 adapted to fit between the annularprojections e on the propeller-shaft E, as shown in Figs. 1 and 4.

The bearings G G, after being screwed into position within the socket A,are secured, preferably, by means of screw-bolts H H, going throughperforations in the flanges G G and screwed into the inner end of thehub A, as shown in Figs. 1 and 2.

The rear ends of the bearings G G are made to rest against an annularshoulder A in the rear end of the hub A, as shown in Fig. 1, so as toaid in securing the bearings within the socketed stern-post, andpreventing water from entering at this place. In practice I prefer toprovide one of said bearings G with longitudinal ribs or projections GG, adapted to fit into corresponding grooves or recesses g g, as shownin Fig. 3, so as to hold said semicircular bearings together while beingscrewed into or out of the screw-threaded socket in the stern-post A.

I, in Fig. 1, is an oil-hole going through the upper part of the hub Aand the upper bearing G for the purpose of oiling the propellershaftwhere it is journaled in the bearings For the purpose of evenlydistributing the lubricant from one end to the other of the bearings Imake longitudinal perforations g g through the lower portions of theribs g g in the lower bearing G, as shown in Figs. 3 and 4., by means ofwhich free communication is established from one groove g to the othersin the series, thus insuring an even and perfect lubrication throughoutthe whole length of the bearings G.

In the modification shown in Fig. 5. the bearings instead of beingexternally screwthreaded are provided with elongated vertical wings G Gadapted to fit into correspond ingly-shaped recesses A in the stern-postA and secured to the latter by means of fastening-bolts K K, as fullyshown in said Fig. 5.

What I wish to secure by Letters Patent and claim is The combinationwith the stern-post A, of a vessel having an enlarged,internallythreaded socketed hub with a shoulder at the rear end of saidsocket and a contracted opening arranged centrally of the socketed huband extending entirely through the latter, of a two-part shaft-bearingexternally screwthreaded to fit the threaded socketed hub, longitudinalribs or projections onone of said bearings which fit in correspondinggrooves or recesses in the abutting bearing, said bearing being alsoprovided on its interior with alternate annular grooves and projectionsand transverse orifices arranged through the projections of the lowerpart of the bearing for the passage of a lubricant, bolts passed throughthe flanged parts of said bearings and entering the hub, thepropeller-shaft passing through said bearing'and contracted opening inthe hub and provided with alternate annular grooves and projections toengage the corresponding grooves and projections of the bearings, and apropeller mounted upon the end of said shaft, substantially asdescribed.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing Witnesses, on this 15th day of November, A.D. 189%.

\VILLIAM M. CAMPBELL.

itnesses:

ALBAN ANDREN, LAURITZ N. MoLLER.

